Motor.



A. E. GUY.

MOTOR.

APPLICATION FILED APR. 30.1908. 908,662, Patented Jan. 5, 1909.

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MOTOR.

APPLICATION FILED APE. 30.1908.

908,662. Patented Jan. 5, 1909.

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UNITED STATES PATENT oEEIoE.

ALBERT E. GUY, or TRENTON, NEw JERSEY, ASSIGNOR TO DE LAVAL STEAMTURBINE COMPANY, OF NEW YORK, N. Y., A CORPORATION or EW JERSEY.

MOTOR.

Specification of Letters Patent.

Patented Jan. 5, 1909. 7

Application filed April 30, 1908. Serial No. 430,046.

T 0 all whom it may concern:

Be it known that I, ALBERT E..GUY, a citizen of the United States ofAmerica, and a resident of Trenton, county of Mercer, and State of NewJersey, have invented certain new and useful Improvements in Motors, ofwhich the following is a specification.

My invention relates to improvements in motors, and particularly to highspeed mo tors such as axial flow steam turbines, direct impact hydraulicmotors, and the like, and consists in a power unit comprising a luralityof high speed motors operating riving shafts upon which are pinionsdriving speedreducing gears, each pinion driving two such gears, one ofsuch gears being common to the pinions of two adjacent motors.

Various practical considerations limit the desirable diameter of therotating member of very high speed motors, such as certain t ypes ofsteam turbines, direct impact water wheels and the like; and to utilizesuch motors in large power units it is preferable to employ a pluralityof such motors operating in parallel or series, rather than to provide asingle larger motor which, because of its greater size, must operate ata lower rotative speed. These high speed motors usually comprise, as apart of them, reducing gearing,

the main driving shaft or shafts of the motor not being driven directlyby the rotating element of the motor, but being driven through thisgearing. In such cases large powers may be obtained with economy inconstruction, operation, and space occupied, by providing a plurality ofthe motors arranged preferably side by side and driving, throu h theirreducing gear, one or a plurality of re atively low speed drivingshafts, one gear of the reducing gearing of any two adjacent motorsbeing 'ossessed by such two motors in common; w ich arrangement not onlyhas the advantage of causing the two motors to operate at correspondingspeeds and to carry corresponding loads, but involves a less number ofgears than would be required if the motors were entirely independent;and the resulting duplex, triplex, etc., motor unit is, to all intentsand purposes, as truly a single unit as if all of the rotating parts ofthe several motors were on a single shaft, while the complications thatwould attend the lacing of so many rotating parts upon a sing e highspeed shaft, are obviated.

In. the accompanying drawings I illustratesuch apower unit.

In said drawings: Figure 1 is a diagrammatic lan View i1 ustratin purelydiagrammatica ly the layout of sue a power unit as applied to thedriving of a plurality of centrifugal pumps, and also illustratesdifierent ways of connecting these pumps together, ac-

cording to requirements of particular conditions. Fig. 2 is a plan viewof such a power unit and ump unit showing the parts approximate y asthey would appear in actual use.

It is obvious that according to the method of combining in a singlepower unit a plurality of high speed rotary motors, there may be anydesired number of such motors arranged in parallel and driving, throughsuitable gearing, the same or corresponding low speed shafts. In thedrawings I show a unit comprising only two such motors, but it will beobvious that the number might be greater and that by illustrating a unitcomprising only two such motors I do not in any way limit myself so faras the use of a greater number of motors is concerned.

In the drawings, 1 and 2 designate similar rotary motors, for example,high speed steam turbines; and 3 designates a pipe for supplying Workingfluid to such motors and 4, 4 throttle valves therefor. 5 and 6designate the high speed. shafts of such motors, said shafts customarilycarrying 'the rotating driving members (not shown), and 7, and 8designate gearpinions mounted upon shafts 5 and 6 respectively, anddriving reducing gears 9, 10 and" 11; these gears being upon shafts 12,13 and 14 respectively.

Since each inion 7 or 8 drives two opposite gear whee s 9 and 10, or 10and 11, as the case-may be, side pressure of one of these gearsuponthepinion is neutralized by the opposite and equal side pressure of theother gear, and since gear 10 is driven directly by both inions, 7and-'8, only one gear is reuire to balance, -as to these two pinions,tie side pressures produced by gear 9, with respect to pinion 7, andgear 11, with respect to pinion '8. Moreover, since both pinions drivethe same gear 10, both motors, 1 and 2, must operate at correspondingspeeds and must act in all respects as if they were in fact one singlemotor.

It will be seen that in such a unit there are three shafts, 12, 13 and14, from any one or more, or all, of which power may be taken off. Inmany cases this possession of a plurality of parallel driving shaftsoperating at corresponding speeds and always working in synchronism, ishighly desirable. For example, in the operation of centrifugal pumps,

by operating a plurality of centrifugal pumps in series, it ispracticable to work efiiciently against high heads; also where largedelivery against low heads is desired, a plurality of relatively smallcentrifugal impellers operate on the whole more'elficiently than asingle impeller of larger size.

In Fig. 1 I have indicated, purely diae grammatically, three centrifu alpumps, 15, 16 and 17, the shafts of which are connected to shafts 12, 13and 14 respectively, by suitable couplings 30, 31 and 32 respectively;and I have indicated said pumps as provided with supply connections 18having control valves 19, 20 and 21 respectively, and have shown adischarge pipe 22 with which the three pumpsare connected in parallelthrough discharge valves 23, 24 and 25 respectively, and have also shownpumps 15 and 16 connected by pipe 26 having in it a shut ofi valve 28and pumps 16 and 17 connected by a pipe 27 having in it a shut off valve29. It will be obvious that this arrangement permits the connection ofthe three umps 15, 16 and 17 to discharge pipe 22 cit er in arallel(valves 28 and 29 being closed in sucli case and valves 23, 24 and 25open) or in series (valves 28 and 29 being open in such case and valves20, 21 23 and 24 being closed). It will be obvious that various otherpower utilizing devices may be driven by the motor unit in the samemanner. It will also be obvious that any one of such power utilizingdevices may be operated alone, the entire power of all the motors beingtransmitted to it, if desired, through the gearin In Fig. 2 I haveilfustrated in lan the layout shown in Fig. 1, as it woul d appear inactual practice, except that I have not indicated a connection, frompump 16 to the other two pumps and I have shown pumps 15 and 17connected in series and have not shown valves such as indicateddiagrammatically in Fig. 1. In this figure, as in Fig. 1, 1 and 2 reresent rotary fluid pressure motors of big speed type supplied withworking fluid through ipes 3 controlled by throttle valves 4, saidmotors driving by means of their shafts 5 and 6, the helical inions 7and 8 intermeshing with the he ical gears 9, 10 and 11 on shafts 12, 13and 14. 15, 16 and 17 designate the said pumps driven from shafts 12, 13and 14 through coup' ling 30, 31 and'32 respectively. In this case Ihave shown pumps 15 and 17 connected in 'series, 35 being the supplypipe to pump 15,

34 the pipe'conveying the discharge from pum 15 to the intake of pump17, and 36 the ischarge pipefrom pump 17 37 designates the supply pipeof pump 16 and 38 the discharge pipe thereof.

In cases where it is desired to take off all the power from one shaft, Imay of course omit caring not required to transmit power direct y tosaid shaft. For exam le, if it is desired to take ofl all the ower romshaft 13, gears 9 and 11 may e omitted, bot pinions 7 and 8 meshing withgear 10. I

What I claim is 1. A ower unit comprising in combination a urality ofhigh speed rotary motors, a num er of low speed shafts greater by onethan the number of such motors, and gears on such low speed shafts andpinions driven directly by said motors and each driving directly two ofsuch gears, adjacent motors driving in common one of said gears.

2. The combination with a power uni-t comprisin a lurality of rotaryhigh speed motors, of a p urality of power utilizing devices greater innumber by one than the number of such motors, said power utilizingdevices each having a gear wheel and each motor driving directly apinion located between and driving two of such gears, adjacent motorsdriving in common one of such gears, and connections whereby said powerutilizing devices may be operated either in series or in parallel.

3. A power unit comprising in combination a plurality of relativelyindependent high speed rotary motors, each provided with controllingmeans independent of thecontrolling means of the rest, a low speedshaftand a reducing gear on said shaft and pinions in driving connectiontherewith and directly driven by said motors.

4. The combination with a ower unit com rising a plurality of relativelyinde motors, a plurality of low speed shafts and gears on such low speedshafts and pinions driven directly by said motors and driving saidgears, and together comprising a gear train whereby any one of saidmotors ma drive all of said low speed shafts, of a plura ity of powerutilizing devices each driven from one of said low speed shafts.

6. A ower unit comprising in combination a p urality of high speedrotary motors, a plurality of low speed shafts and gears on such lowspeed shafts and inions driven specification in the presence of twosubdirectlyhby said moftors 2mg driving such scribing witnesses. Igears, t e mlons 0 two a jacent motors driving diregtly the same gear,one or more ALBERT 5 of such low speedshafts constituting a driveWitnesses:

shaft of the power unit. H. M. MARBLE,

In testimony whereof I have signed this FRANK E. RAFFMAN.

